基于有限元法LED散热强化研究

发布时间：2018-01-21 05:14

  本文关键词： 大功率LED 数值模拟 热分析 翅片组合 散热性能 温度分布　出处：《电子元件与材料》2016年12期 　论文类型：期刊论文

【摘要】：为了解决大功率LED散热问题,构建了包括LED固体部件及外部流体空间的三维数学模型。基于有限元法,应用k-ε模型模拟自然对流换热条件下LED模组散热情况。模拟结果表明,LED模组温度场分布不均,芯片结温较高;受芯片功率密度及位置布设的影响,中心翅片的散热效果差。通过改变散热器结构,设计了两种翅片组合形式,虽然换热面积有所减少,但由于中心翅片的对流换热得到强化,达到了降低结温的效果,提高了散热性能。
[Abstract]:In order to solve the heat dissipation problem of high-power LED, a three-dimensional mathematical model including LED solid components and external fluid space is constructed based on finite element method. K- 蔚 model is used to simulate the heat dissipation of LED module under natural convection heat transfer. The simulation results show that the temperature field of LED module is uneven and the chip junction temperature is high. Under the influence of chip power density and position layout, the heat dissipation effect of the central fin is poor. By changing the structure of the radiator, two kinds of fin combination forms are designed, although the heat transfer area is reduced. However, the convection heat transfer of the central fin is strengthened, which can reduce the junction temperature and improve the heat dissipation performance.
【正文快照】： 第 35 卷 第 12 期 电 子 元 件 与 材 料 Vol.35 No.12 2016 年 12 月 ELECTRONIC COMPONENTS AND MATERIALS Dec. 2016 基于有限元法 LED 散，

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